A Computerworld blog speculates that the open-source Unix distribution may live on, but Oracle won't be supporting it. At this point, "OpenSolaris' only real future is as a fork, which would not be easy to pull off. Still, with enough interest from developers it could be done. OpenSolaris is licensed under the GPLv3 CDDL and various other OSS licenses, so the base code is available."

Still, gplv3 is delightfully linux-kernel-incompatible, so it doesn't make any difference.

And if they went for something that was compatible with the Linux kernel it wouldn't have made a lick of difference. The two operating system are so different in nature any cross pollination would be non existent. People here have this deluded idea that some how that if OpenSolaris kernel was at least GPL then there would be this great code sharing fest between the two projects - you find that people who make such declarations have never written a line of code in their life any more complicated than a 'hello world'.